diff options
| author | Stephen Warren <swarren@nvidia.com> | 2012-04-04 15:48:28 -0600 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-04-06 10:47:34 +0100 |
| commit | bacdbe077342ecc9e7b3e374cc5a41995116706a (patch) | |
| tree | b5cf9547a0ab4a7fba287a3d654d132869057afa /drivers/base/regmap/internal.h | |
| parent | 0135bbcc7a0cc056f0203ff839466236b8e3dc19 (diff) | |
regmap: introduce fast_io busses, and use a spinlock for them
Some bus types have very fast IO. For these, acquiring a mutex for every
IO operation is a significant overhead. Allow busses to indicate their IO
is fast, and enhance regmap to use a spinlock for those busses.
[Currently limited to native endian registers -- broonie]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/base/regmap/internal.h')
| -rw-r--r-- | drivers/base/regmap/internal.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index b95fd1f2529..e46c279f828 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -31,8 +31,14 @@ struct regmap_format { unsigned int (*parse_val)(void *buf); }; +typedef void (*regmap_lock)(struct regmap *map); +typedef void (*regmap_unlock)(struct regmap *map); + struct regmap { - struct mutex lock; + struct mutex mutex; + spinlock_t spinlock; + regmap_lock lock; + regmap_unlock unlock; struct device *dev; /* Device we do I/O on */ void *work_buf; /* Scratch buffer used to format I/O */ |